Improvement in lamps



E. STOLPE.

, Lamp.

No. 220,315. Patented Oct. 7,1879.

INVENTOR N PETERS` PHoTU-LITHOGRAPHER, wAsNlNuTON. u, c,

UNITED STATES PATENT OEEIoE.

EDWARD STOLPELOF WASHINGTON, DISTRICT OF COLUMBIA.

IMPROVEMENT IN LAMPS.

Specication forming part of Letters Patent No. 220,315, dated October?, 1879 application tiled January 29, 1879.

To all whom 'it may concern.-

Be it known that I, EDWARD STOLPE, 0f Washington" city, ADistrict of Columbia, have invented certain new and useful Improvements in Lamps 5 and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the 4'art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

lVIy invention relates to that class of lamps known as student-lamps,7 in which the oilreservoir is on one side of the stand and the burner on the other side; and my invention consists in so constructing said lamp that by using the smallest possible quantity of metal, and by allowing a greater space for the passage of air, the burner is not heated to so great a degree as to cause the production of inflammable gas,as is fully set forth in the following specitication and accompanying drawings, in which- Figure l is a side eleva-tion of a studentp lamp, the burner and wick being shown in section. Fig. 2 is a horizontal section of the burner on the line x Fig. 1. Fig. 3 is a horizontal section of the same at y y, Fig. l. Fig. 4 is an enlarged sectional view of the burner.

The wick-tube has a double wall, which is connected and closed near the bottom, the space between the two serving as a chamber to receive the oil and wick, and also a part of the mechanism for raising andlowering the wick. The wick-tube is, as usual, round, and the wick tubular. The lower end of the outer wall of the wick-tube extends below the inner, and is perforated.

The tube G is provided on the outside with a screw-thread, and passes over the inner pon tion, D', of the wick-tube. A short tube, N, passes over the tube Gr, and on this the wick is drawn and fastened. Inside of tube N, at its lower end, is cut a female screw-thread, which works in the male screw-thread on tube G. The lower end of tube N has a projection provided with slits, in one of which the guide l, on the inner side of the outer wall, D, of the wick-tube, slides, as shown in Fig. 3. The other slits in the projecting portion of tube N serve as openings for the oil to penetrate to the wick-chamber.

Near the upper end of tube G is a cross-bar, O, resting on the inner portion of the wick-tube D D', as shown in Fig. 2. To this bar is attached, by a hook or other suitable device, a shaftorrod,H,passingvertically down through the center of the wick-tube D D', and having at its lower end a shoulder, e, which bears against the turning disk L, secured in place by the nut f.

The drip-cup K is secured to the lower end of the rod H by means of a screw-thread, d, on the lower projecting part of rod H, which also holds it iirmly up against the turning disk L.

The turning disk L is provided with dripholesJi h', and has an upper circular groove, i, for the reception of the lower perforated end of the wick-tube D D', and a lower groove, t', to receive the upper rim of the dripcup K.

An annular perforated disk, P, provided with a stationary chimney-holder, Q, is attached at any suitable place to the wick-tube. Through the perforations therein air is supplied to the outer side of the iame. The inside of the iiame is supplied with air through the interior of the inner wall of the wick-tube D D' by means of the perforations'in the lower end of the outer wall of the wick-tube and the drip-holes in the turning disk L.

In order to raise or lower the wick the disk L is turned to the right or left, causing the shaft H, attached to cross-bar O, to turn the tube Gr, which, by the action of its lower threaded part on the correspondingly-threaded portion of the tube N, raises or lowers this tube and the wick.

The passage of air to the inner and outer sides ot' the iiame not being obstructed, as in other studentlamps heretofore made, the overheating of the metal is prevented and risk of spontaneous explosion obviated.

I claim as my inventionl. The combination and arrangement of wick-tube D D' with tube Gr, provided with a cross-bar, O, said cross-bar being attached some distance below the upper end of tube G, and resting on top ofthe inner portion of wiektube D D', substantially as specified.

2. The combination and arrangement of a wick-tube, D 1)', tube G, and cross-bar located as described, with a shaft or rod, H, said rod having a shoulder, e, and screw-threaded extension d, substantially as specified.

' 3. The combination and arrangement of Wick-tube 1) D', tube G, cross-bar 0, and shaft 0r rod H with a turning disk, L, having dripholes h h and circular grooves i i', and kept in place by a screw-nut, f, substantially as and for the purposes specified.

EDW. STOLPE.

Witnesses:

Hmm. LAUTEN, J. U. SCHROEDER. 

